Reproduction
Reproduction referred to a species' ability to create new members of itself.
Various accounts differed on how the Time Lords propagated their species. The Eleventh Doctor suggested that his people reproduced sexually, (TV: The Rebel Flesh) while other accounts indicated that Gallifreyans reproduced asexually via Looms. (PROSE: Cat's Cradle: Time's Crucible, Cold Fusion, Lungbarrow)
Humans reproduced sexually, the gestation period of the new human lasting nine months. (TV: The Gathering, Dark Water, The Tsuranga Conundrum) During the Human-Hath War, the humans, and the Hath, employed progenation as a means of reproduction, growing a new lifeform from a single donor organism. (TV: The Doctor's Daughter)
The Dalek race propagated itself and its eternal war against reality through cloning. (AUDIO: The Mutant Phase) When new Dalek mutants were born, body parts that were deemed superfluous were removed, with the genetic material being used to breed new Dalek embryos. (PROSE: Dalek) The embryos were grown in incubation chambers. (TV: Genesis of the Daleks, PROSE: Remembrance of the Daleks, AUDIO: Return to Skaro)
Asexual and biologically immortal, the Ashtallans had no concept, or method, of reproduction until the First Doctor used cloning technology to combine Brenna and Sharlan's DNA into a new being. (AUDIO: The Invention of Death)
The Spherions, a species of sentient crystals, reproduced by incubating their young in organic matter. When their homeworld was colonised by a more advanced species, the Spherions, unaware that organics could be sentient, incubated their young in the Calaxi before the Eighth Doctor and Josie Day convinced them to leave the organics alone, bringing them to a new planet. (COMIC: Music of the Spherions)
